https://ift.tt/QOWM3xz Introduction An index is a unique lookup table in SQL databases that the database search engine can use to expedite ...
Introduction An index is a unique lookup table in SQL databases that the database search engine can use to expedite data retrieval. When an index is built on a table’s columns, the database can locate rows considerably more quickly than in the absence of an index. See an index as a book’s reference guide; it […]
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